Frost dates for Round Rock, Texas
In a typical year, Round Rock’s last spring frost lands around Mar 11 and the first fall frost around Nov 20, a growing season of about 254 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 9a.
Right now the growing season is open, with about 26 days until the typical first fall frost.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Feb 22 | Nov 3 |
| 50 percent | Mar 11 | Nov 20 |
| 90 percent | Mar 29 | Dec 9 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Round Rock is typically around 67°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Round Rock
- Radish (Cherry Belle)
- Garlic (Music)
Timing comes from the same temperature engine the app uses, run against Round Rock’s normals for today.
Common questions
When is the last frost in Round Rock, Texas?
Round Rock’s last spring frost falls around March 11 in a typical year. One year in ten it is done by February 22, and one year in ten frost holds on until March 29. Frost-sensitive planting usually waits for the late side of that band.
When is the first fall frost in Round Rock?
The first fall frost arrives around November 20 in a typical year, as early as November 3 in an early year and as late as December 9 in a late one.
How long is the growing season in Round Rock?
About 254 days, counted between the typical last spring frost and the typical first fall frost.
What USDA zone is Round Rock in?
Round Rock is in USDA hardiness zone 9a under the 2023 USDA Plant Hardiness Zone Map.
Dates come from 30-year NOAA climate normals for the nearest reporting station. They describe odds, not a forecast.
Nearby cities
- Austin, TX (around Feb 20 to Dec 3)
- Killeen, TX (around Mar 14 to Nov 17)
- Waco, TX (around Mar 9 to Nov 20)
- College Station, TX (around Feb 27 to Nov 30)
- San Antonio, TX (around Feb 25 to Nov 28)
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
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